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Thread: Sprocket Nuts 'n' Bolts

  1. #1
    Baby Twin
    Join Date
    Jan 2012
    Location
    Cambs
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    15

    Sprocket Nuts 'n' Bolts

    Morning all...

    Work on the Mille is coming along nicely (although a little slower than I would like) - oil and filter changed, coolant changed, new tyres on, new battery on the Oximiser, next job is the chain and sprockets but I've a small problem...

    I was going to change the rear sprocket at the weekend, while the wheels were off for new rubber but when I tried undoing the sprocket nuts the bolt turned with it, on 2/3 out of the 5 nuts.
    I put my finger in the back of the sprocket carrier to see if there was an allen key head in there that I could use to hold the bolts but it was just a flat surface.

    Is there a trick to getting these undone?

    My plan was to give them a squirt of WD-40 every night in the hope that they'd glide off when I get round to having another go next weekend but failing that I'll have to take them to a mate's garage and get him to blast them with the impact wrench and then just hope that I can tighten them back up with the new sprocket, without having the same issues.

    Any advice / guidance much appreciated.

    Rob

  2. #2
    Superbike Twin
    Join Date
    Oct 2010
    Posts
    228
    I'm not sure if I've misunderstood what your asking here, but I've just done mine so here goes....

    Remove the sprocket carrier and sprocket from the rear wheel as one unit. You will need a spanner (17mm or 19mm I think) to grip a very small sleeve on the back of the sprocket carrier bolts whilst you undo the nuts on the front. Don't get me wrong this can be a pain in the arse process, but its how I did mine. Basically the sprocket carrier nuts are floating inside the hub. Hopefully this image will demonstrate what I'm trying to explain:

    http://i.ebayimg.com/00/$(KGrHqF,!iME2MMY(PfgBNj1o4r3sg~~_35.JPG

  3. #3
    Baby Twin
    Join Date
    Jan 2012
    Posts
    30
    Yep, tommys right, changed mine recently and they were exactly the same. Slowly pull the complete sprocket off the wheel, some of the studs on the back of the sprocket will bring the rubber cushes with them. You can get those off the studs with the WD-40 and carefully easing them off with some pliers but don't damage the rubber. Then there is a little edge on the stud to get a spanner around, so hold it while you turn the nuts. Again, be careful not to damage the edge else you'll end up having to use mole-grips. Oh, and before you before you put the rubber cushes back in the wheel, give the holes in the wheel a clean and a bit of grease to stop any squeaking that some RSV riders seem to get.

  4. #4
    Baby Twin
    Join Date
    Jan 2012
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    Cambs
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    15
    Ah, I think I get what you're saying...

    So with the rear wheel disc side down on the floor, I should be able to remove the whole sprocket-carrier as one, without undoing any sort of fixings?
    And then when I've done that, I can take the cush drive rubbers off the pins to reveal the 'edges' I can get a spanner on while I undo the nuts from the other side?

    This is all new to me - I'm used to sprockets that are 'hard fixed' to the rims on a motocross bike.

  5. #5
    Superbike Twin CRAZY LEG5's Avatar
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    Oct 2010
    Location
    warrington
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    237
    Yep you have it there mine comes off with out the rubbers but when you have the carrier off and look at the back you will see what they mean

  6. #6
    Baby Twin
    Join Date
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    Excellent, thanks all - looking forward to cracking on with that next weekend!!

  7. #7
    One Liter Duc Eater PaulW's Avatar
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    Oct 2010
    Location
    North Cambs
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    512
    Small tip, put the carrier back on the hub but only on two holes, leaving the others free for you to attach the spanner to. That'll hold the carrier steady. Otherwise you'll be juggling holding the carrier with one hand on a spanner & the other on your ratchet wrench.

    HRH

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